Article (Scientific journals)
Revised structural phase diagram of (Ba0.7Ca0.3TiO3)-(BaZr0.2Ti0.8O3)
Keeble, Dean S.; Benabdallah, Feres; Thomas, Pam A. et al.
2013In APPLIED PHYSICS LETTERS, 102 (9)
Peer reviewed
 

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Abstract :
[en] The temperature-composition phase diagram of barium calcium titanate zirconate (x(Ba0.7Ca0.3TiO3)(1-x)(BaZr0.2Ti0.8O3); BCTZ) has been reinvestigated using high-resolution synchrotron x-ray powder diffraction. Contrary to previous reports of an unusual rhombohedral-tetragonal phase transition in this system, we have observed an intermediate orthorhombic phase, isostructural to that present in the parent phase, BaTiO3, and we identify the previously assigned T-R transition as a T-O transition. We also observe the O-R transition coalescing with the previously observed triple point, forming a phase convergence region. The implication of the orthorhombic phase in reconciling the exceptional piezoelectric properties with the surrounding phase diagram is discussed. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793400]
Disciplines :
Physics
Author, co-author :
Keeble, Dean S.
Benabdallah, Feres
Thomas, Pam A.
Mario, Maglione
Kreisel, Jens ;  University of Luxembourg > Rectorate
External co-authors :
yes
Language :
English
Title :
Revised structural phase diagram of (Ba0.7Ca0.3TiO3)-(BaZr0.2Ti0.8O3)
Publication date :
2013
Journal title :
APPLIED PHYSICS LETTERS
Volume :
102
Issue :
9
Peer reviewed :
Peer reviewed
Focus Area :
Physics and Materials Science
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